Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263761AbUFTUPy (ORCPT ); Sun, 20 Jun 2004 16:15:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265940AbUFTUPy (ORCPT ); Sun, 20 Jun 2004 16:15:54 -0400 Received: from ylpvm43-ext.prodigy.net ([207.115.57.74]:29360 "EHLO ylpvm43.prodigy.net") by vger.kernel.org with ESMTP id S263761AbUFTUPx (ORCPT ); Sun, 20 Jun 2004 16:15:53 -0400 Message-ID: <40D5F053.9000209@pacbell.net> Date: Sun, 20 Jun 2004 13:15:15 -0700 From: David Brownell User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225 X-Accept-Language: en-us, en, fr MIME-Version: 1.0 To: Jeff Garzik CC: Ian Molton , James Bottomley , rmk+lkml@arm.linux.org.uk, linux-kernel@vger.kernel.org, greg@kroah.com, tony@atomide.com, jamey.hicks@hp.com, joshua@joshuawise.com Subject: Re: DMA API issues References: <40D359BB.3090106@pacbell.net> <1087593282.2135.176.camel@mulgrave> <40D36EDE.2080803@pacbell.net> <1087600052.2135.197.camel@mulgrave> <40D4849B.3070001@pacbell.net> <20040619214126.C8063@flint.arm.linux.org.uk> <1087681604.2121.96.camel@mulgrave> <20040619234933.214b810b.spyro@f2s.com> <1087738680.10858.5.camel@mulgrave> <20040620165042.393f2756.spyro@f2s.com> <20040620162611.GB16038@havoc.gtf.org> In-Reply-To: <20040620162611.GB16038@havoc.gtf.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 620 Lines: 18 Jeff Garzik wrote: > 2) is unneeded, as many other drivers in this same situation simply use > ioremap But ioremap() only solves the problem of allocating virtual address space to match this memory. It doesn't solve the problem of then allocating/freeing such memory through dma_alloc_coherent(), so that the drivers that need to share access to that memory can do so. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/